Spa



FIG. 1 is a perspective view of the design for a spa shell in accordance with the present invention.

FIG. 2 is a top view of the design for a spa as shown in FIG. 1.

FIG. 3 is a front elevation of the design for a spa shell as shown in FIG. 1.

FIG. 4 is a cross sectional view of the design for a spa shell taken along line 4—4 of FIG. 2.

FIG. 5 is a cross sectional view of the design for a spa shell taken along line 5—5 of FIG. 2.

FIG. 6 is a side elevation view of the design for a spa shell as shown in FIG. 1.

FIG. 7 is a perspective view of the design for a spa in accordance with the present invention; and,

FIG. 8 is a back elevation of the design for the spa shell as shown in FIG. 1.

The broken lines shown in the drawings represent unclaimed portions of the spa and form no part of the claimed design. 

The ornamental design for a spa, as shown and described. 